Python字典检查key是否存在

Question

@commands.command(aliases=['lookup'])
    async def define(self, message, *, arg):
        dictionary=PyDictionary()
        Define = dictionary.meaning(arg)
        length = len(arg.split())
        if length == 1:
            embed = discord.Embed(description="**Noun:** " + Define["Noun"][0] + "\n\n**Verb:** " + Define["Verb"][0], color=0x00ff00)
            embed.set_author(name = ('Defenition of the word: ' + arg),
            icon_url=message.author.avatar_url)
            await message.send(embed=embed)
        else:
            CommandError = discord.Embed(description= "A Term must be only a single word" , color=0xfc0328)
            await message.channel.send(embed=CommandError)

我想检查 和 是否Noun在Verb字典中Define，因为当一个单词在其定义中只包含一个名词时，它会抛出一个错误，因为我试图通过机器人输出名词和动词，看看我得到了什么。我是字典新手，非常感谢任何帮助

Answer 1

您可以使用以下代码测试密钥是否存在：

if key_to_test in dict.keys():
   print("The key exists")
else:
   print("The key doesn't exist")